Calex Electronics Limited announces the availability of a series of hold up modules designed for use with Calex DC/DC converters to protect against brown out and temporary power loss conditions and provide a clean uninterrupted source of power for downstream circuitry. Two models are available: the HU-28, provides a complete turnkey solution for easy design integration, the hold up light HUL-28, requires the use of an external capacitor bank in addition to the HUL module.